multiply proper fractions
1/3 x 4/3 =
4/9
2/3 / 3/4
8/9
12 x 3 =
36
1 2/3 + 2/3
2 1/3
1/3 + x/3 = 1
x = 2
6/9 x 1/5 =
6/45
3/6 / 5/7
21/30
13 x 5 =
65
2 2/5 + 1/5
2 3/5
1/x + 1/4 = 3/8
x = 8
7/8 x 2/4 =
14/32
8/10 / 8/9
72/80
14 x 4 =
56
10 1/3 + 1 1/3
11 2/3
1/10 + x/10 = 5/10
x = 4
5/6 x 5/6 =
25/36
10/20 / 9/10
100/180
15 x 9 =
135
20 1/5 + 5 3/5
25 4/5
10/20 + y/20 = 1
y = 10
15/20 x 4/5
60/100
100/200 / 6/10
1000/1200
125 x 4 =
500
50 2/5 + 25 1/5
75 3/5
x/4 + 2/v = 3/4
x = 1
v = 4